从我国各选厂螺旋分級机的使用情况看来,普遍存在着下部軸承进砂,軸承很快磨坏,下端軸承使用寿命极短的現象。一般滾动式下端軸承只能使用2～3个月,还需要每月清洗检查一次,因而严重地影响了生产。国外也同样存在着这一問题,因此各国选矿机械工作者都做了很多工作,力求得到改进。苏联1963年生产的直径2000和直径2400的单、 From the selection of our plant spiral classifier view of the situation, the prevalence of the lower part of the bearing into the sand, bearing worn quickly, the short bearing life of the lower end of the phenomenon. General rolling bearings can only be used for 2 to 3 months, but also need a monthly cleaning check, which seriously affected the production. This problem also exists in foreign countries, so various mineral processing machinery workers have done a lot of work and strive to be improved. The Soviet Union in 1963 produced a diameter of 2000 and a diameter of 2400 single,